I use them for learning a library or framework. I'll fold all of the functions, methods, etc. in a file and and then unfold to dig deeper. I work on a 13" mba s

I use them for learning a library or framework. I'll fold all of the functions, methods, etc. in a file and and then unfold to dig deeper. I work on a 13" mba so it helps with the lack of vertical screenspace.